I suppose it's not slut behaviour either to be interested in your sister's bf huh?
no, slut behavior would be to fuck someone just because they are your sisters bf. can your brain comprehend the difference?
Alexis meets MC before layla does. And even if you dont fuck her in the plane, you can reinitiate her romance path in the bar which happens before you get close to Layla. in both cases (not sure about secret alexis path that i heard rumours about) she falls for MC before MC can become Layla's BF.
and i dont need any further proof that this example of yours is idiotic and god i hope you know that and are just ragebaiting, because when alexis find out that you are doubletiming her and her sister she immediately dumps you and neither or the two speaks with you again on good terms.
Even if MC is not an asshole who is trying to date both sisters and just happens to fall for layla after having some fun with alexis, when she sees two of them on the couch she goes back to her room and when mc talk to her she wants to end what they are having for layla's sake or want to make sure MC stops his advances at layla if he wants to continue to explore things with Alexis.
Seriously, if you are not ragebaiting then i cant afford to lose any more brain cells on you. I guess i shouldnt be surprised you like characters like tori, those kind of women are probably only ones that give you any attention